Yamaha introduced two new high-performance headphones models in the HPH-PRO series, including the PRO500 and PRO300. The headphones include dedicated iPhone/iPod remote, mic, and is available in a variety of racy color options. The PRO500 packs 50 mm drivers, with 22Ω impedance, 105 dB sensitivity, and 22-22,000 Hz frequency response; while the PRO300 packs 40 mm drivers, 53Ω impedance, 107 dB sensitivity, and 20-20,000 Hz frequency response. Both headphones ship with fixed cords. Slated for December, the Yamaha HPH-PRO500 will be priced at 50,000¥ ($620), while the HPH-PRO300 could go for 30,000¥ ($375).